Spring-teeth for harrows



B. F. EATON. Spring Teeth for Harrow's.

No. 232,119. Patented Sept.'14,I880.

N. PETERS. FHOTO-LITHOGRAPHER. WASKINGTON. a c.

UNrrEn STATES PATENT @EErcE.

BENJAMIN F. EATON, OF OOXSAOKIE, NEYV YORK.

SPRING-TEETH FOR HARROWS.

SPECIFICATION forming part of Letters Patent No. 232,119, datedSeptember 14, 1880.

Application filed November 13, 1879.

To all whom it may concern:

Be it known that I, BENJAMIN F. EATON, of Ooxsackie, Greene county, inthe State of New York, have invented a new and useful Iniprovement inSpring-Teeth for Harrow-s, of which the following is a specification.

My invention relates to curved flat springteeth for harrows.

The object of my invention is to provide a curved flat springbarrow-tooth with digging points on each end in such a manner as torender the said tooth serviceable for operating with the soil by eitherof its ends by reversing the tooth in its frame, and also to stiffen thetooth at its how, so as to render it capable of resisting excessivestrain, and also to provide the digging ends of the tooth with asupplementary duplex point, which may be reversed in its attachment tothe tooth as its wear may require.

The invention consists in acurved springtooth provided withdigging'points at the opposite ends thereof, whereby the tooth may be atany time reversed in its attachment to the frame and either end may beemployed for digging.

It also consists in the combination, with a curved spring barrow-tooth,of supplementary digging points having both ends thereof pointed andadapted to be used as diggingshears.

It finally consists in the combination, with a curved springharrow-t0oth, of an elastic stiffening-piece fitting and secured to therear side of said tooth, whereby the said tooth will be strengthenedagainst excessive strain.

In the accompanying drawings, in which similar letters of referenceindicate like parts, Figure 1 represents a sectional elevation of theharrowtooth. Fig. 2 is a sectional elevation of the same with thestrengthening-piece extended in its upper end. Fig. 3 is a view ofthetooth when pointed and before being curved, and Fig. 4 is aperspective view of a tooth provided with a duplex su 'iplementarypoint.

In the drawings, A is the tooth, which toot-h is made of flatspringsteel, and is provided with digging-points a a, one at each end,as shown in Fig. 3. Made in each end, at a short distance back of saiddigging'points a and a, are the holes .90 m, which holes are intended toreceive bolts 1), for the attachment of the tooth to the frame when theopposite end point is to be used for digging in the soil, and also toreceive a bolt, screw, or rivet, c, for the attachment of thesupplementary digging-point B (shown by full lines in Figs. 1 and 4 andby dotted lines in Fig. 3) to the end of the tooth engaging with thesoil.

The supplementary digging-piece Bis made of steel and with points cl (Z,as shown in Figs. 1 and 4, and is provided with one or more holes forattachment to the digging end of the tooth by rivet c or screw or bolt,as maybe selected.

The teeth A is stiffened by means of the elastic piece G, made also offlat spring-steel and fitted to the rear side of the tooth and over thebow of the same, as shown in Figs. 1 and 2. This elastic piece may bemade with an extension which will fall short of reaching the upperforward end of the tooth, as in Fig. 1, or it may be made to extend tothe said upper forward end, as shown in Fig. 2. The said elasticstiffeningpiece is secured to the tooth A by bolt 0, or by a clip, or byrivets, as may be selected.

Holdingspuds and'recesses similar to those employed in carriage-sprin gsmay also be used for holding the stiffening-piece from working to oneside.

D is a beam or bar, made of wood or iron, and forming a part of thebarrow-frame, which frame may be madein any form selected. Thesupplemental duplex point B maybe made with the same or with a greaterwidth in its extension from side to side than that of the tooth.

The advantageous results secured by my improved tooth are these: Withdigging-points made with the opposite ends of the tooth the tooth willbe adapted to a reversal of ends, so that when one end becomes worn thetooth may be reversed and the opposite end of the tooth be used forworking up the soil,-while at the same time the body of the toothintermediate between the two digging-points of the same will in allcases operate as an elastic standard for carrying thedigging-points,which operate as shares when working with the soil, andas the said share-points are about horizontal they will cut away theroots of weeds and grass while they run beneath the surface of the soil,while the soil will be thoroughly stirred by meeting resistance againstthe concave side of the tooth. By means of the duplex supplementarypointB the-operator may, when operating with gravelly or stony soil,protect the terminating ends and original diggin gpoin ts of the toothfrom excessive wear, while the said supplementary point maybe dispensedwithin working with sandy or loamy soil; and when the said supplementarypoint B is employed the tooth A will operate as an elastic standard andthe point be, in fact, a reversible share. It will therefore be readilyseen that with the tooth provided with digging-points a and a and aduplex supplementary.point, B, the tooth will be fitted for enduring atleast four times longer than it would were but one point furnished thetooth.

Another advantageous result secured is that the tooth is strengthened atits bow against straightening out under an excessive resistance as thetooth is drawn forward, as in the case of working in sod-soil or meetingan obstruction. By providing the tooth with holes m a: at about the samerelative distance from the ends of the same the same holes will serve asameans for alternately attaching the tooth to the beam D and to thesupplementary point B, as occasion may require, and any farmer may makethe change in a few minutes by employing a wrench.

I would remark that the side cutting-edges of the digging-points a a ofthe tooth and cl d of the supplementary piece B may be made either witha plain line or with a convex or concave form of line, as may beselected.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1. Curved spring-tooth A, provided at each end with a digging-point, aor a, and having a hole, 00, near each point, whereby it is adapted toreversal, substantially as set forth.

2. In combination with reversible curved spring-tooth A, the reversiblesupplementary flat diamond-shaped point B, adapted to attachment toeither end of said tooth, substantially as set forth.

3. A reversible spring harrow-tooth having digging-points at each end,substantially as and for the purpose set forth.

4. The curved spring harrow tooth A, in combination with an elasticstiffening-piece, O, secured to the rear side of said tooth,substantially as and for the purpose set forth.

BENJAMIN F. EATON.

Witnesses OHARL s SELKIRK, 'lnos. C. MURRAY.

